<?php if (!defined('BASEPATH')) exit('No direct script access allowed'); 

class CheckBrowser {
	var $UA = ""; //$HTTP_USER_AGENT的内容
	var $BROWSER= "Unknown"; //浏览器类型
	var $PLATFORM = "Unknown"; //操作系统
	var $VERSION= ""; //浏览器版本号
	var $MAJORVER = ""; //浏览器主版本号
	var $MINORVER = ""; //浏览器副版本号
	/* 构造函数开始 */
	function CheckBrowser(){ 
	$this->UA = getenv('HTTP_USER_AGENT'); 
	$preparens = ""; 
	$parens = ""; 
	$i = strpos($this->UA,"("); 
	if ($i >= 0) { 
	$preparens = trim(substr($this->UA,0,$i)); 
	$parens = substr($this->UA,$i+1,strlen($this->UA)); 
	$j = strpos($parens,")"); 
	if($j>=0) { 
	$parens = substr($parens,0,$j); 
	} 
	} 
	else { 
	$preparens = $this->UA; 
	} 
	$browVer = $preparens; 
	$token = trim(strtok($parens,";")); 
	while($token) { 
	if($token=="compatible") {
	} 
	elseif(preg_match("/MSIE/i","$token")) { 
	$browVer = $token; 
	} 
	elseif(preg_match("/Opera/i","$token")) { 
	$browVer = $token; 
	} 
	elseif(preg_match("/X11/i","$token") || preg_match("/SunOS/i","$token") || preg_match ("/Linux/i","$token")) { 
	$this->PLATFORM = "Unix"; 
	} 
	elseif(preg_match("/Win/i","$token")) { 
	$this->PLATFORM = $token; 
	} 
	elseif(preg_match("/Mac/i","$token") || preg_match("/PPC/i","$token")) { 
	$this->PLATFORM = $token; 
	} 
	$token = strtok(";"); 
	} 
	$msieIndex = strpos($browVer,"MSIE"); 
	if($msieIndex >= 0) { 
	$browVer = substr($browVer,$msieIndex,strlen($browVer)); 
	} 
	$leftover = ""; 
	if(substr($browVer,0,strlen("Mozilla")) == "Mozilla") { 
	$this->BROWSER = "Netscape"; 
	$leftover=substr($browVer,strlen("Mozilla")+1,strlen($browVer)); 
	} 
	elseif(substr($browVer,0,strlen("Lynx")) == "Lynx") { 
	$this->BROWSER = "Lynx"; 
	$leftover=substr($browVer,strlen("Lynx")+1,strlen($browVer)); 
	} 
	elseif(substr($browVer,0,strlen("MSIE")) == "MSIE") { 
	$this->BROWSER = "IE"; 
	$leftover=substr($browVer,strlen("MSIE")+1,strlen($browVer)); 
	} 
	elseif(substr($browVer,0,strlen("Microsoft Internet Explorer")) == "Microsoft Internet Explorer") { 
	$this->BROWSER = "IE"; 
	$leftover=substr($browVer,strlen("Microsoft Internet Explorer")+1,strlen($browVer)); 
	} 
	elseif(substr($browVer,0,strlen("Opera")) == "Opera") { 
	$this->BROWSER = "Opera"; 
	$leftover=substr($browVer,strlen("Opera")+1,strlen($browVer)); 
	} 
	$leftover = trim($leftover); 
	$i=strpos($leftover," "); 
	if($i > 0) { 
	$this->VERSION = substr($leftover,0,$i); 
	} 
	else { 
	$this->VERSION = $leftover; 
	} 
	$j = strpos($this->VERSION,"."); 
	if($j >= 0) { 
	$this->MAJORVER = substr($this->VERSION,0,$j); 
	$this->MINORVER = substr($this->VERSION,$j+1,strlen($this->VERSION)); 
	} 
	else { 
	$this->MAJORVER = $this->VERSION; 
	}
	}
}

?>